{"artifact_id":"L1-130","layer":"L1","title":"Neutron Radiography and Tomography","domain":"Scientific Instrumentation","sub_domain":"Neutron transmission imaging complementary to X-ray","physics_fingerprint":{"L_DAG":2.7,"title":"Neutron Radiography and Tomography","domain":"Scientific Instrumentation","carrier":"neutron","primitives":["L.absorb.lambert","L.project.ray","int.spatial"],"sub_domain":"Neutron transmission imaging complementary to X-ray","noise_model":"shot_poisson","problem_class":"linear_tomographic_inverse","solution_space":"attenuation_map","difficulty_delta":3,"integration_axis":"projection","sensing_mechanism":"transmission_attenuation"},"observable_profile":{"metric":"attenuation_NMSE","regime":"Beer-Lambert linear; CT reconstruction via FBP/ASTRA. Mismatch: beam hardening (lambda-dependent), scatter, flux inhomogeneity, motion.","secondary":"spatial_resolution_um"},"size_tiers":{"center_spec":{"omega":{"H":1024,"W":1024,"N_proj":360,"L_over_D":500,"pixel_um":50,"beam_hardening":0.0},"input_format":"projection_stack","problem_class":"neutron_tomography","forward_operator":"neutron_radiographic_forward","epsilon_fn_center":"NMSE 5e-3"},"omega_bounds":{"H":[128,4096],"W":[128,4096],"N_proj":[10,2000],"L_over_D":[50,2000],"pixel_um":[5,500],"motion_blur":[0.0,5.0],"beam_hardening":[0.0,0.3],"limited_angles":[0,120],"scatter_fraction":[0.0,0.3],"flux_inhomogeneity":[0.0,0.2]},"epsilon_bounds":{"nmse":[0.0001,0.1]},"allowed_problem_classes":["neutron_tomography","neutron_2d_radiography","dynamic_neutron_imaging"],"allowed_omega_dimensions":["N_proj","H","W","pixel_um","L_over_D","beam_hardening","scatter_fraction","limited_angles","motion_blur","flux_inhomogeneity"],"allowed_forward_operators":["neutron_radiographic_forward","neutron_bragg_edge_imaging"]},"hardness_fn":{"type":"epsilon_fn","delta":3,"kappa":200,"metric":"attenuation_NMSE"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0x1762642813882dedbb853691ccc843957c3315e2239980116db89db7b68b2940","chain_tx_hash":"0x6c5adda00528028c9a90556c47a6c59e5889c066be928670a8f9d161158ca247","chain_block":41554213}